Electronic states of Mn impurities and magnetic coupling between Mn spins in diluted magnetic semiconductors

About Ge(Mn) diluted magnetic semiconductor

Deposition of 0.5 monolayer of Mn by molecular beam epitaxy on the surface of a Ge(0 0 1) substrate, and annealing, allowed the fabrication of a cluster-free Ge(Mn) diluted solution. Electronic spin resonance (ESR) was used to study the magnetic properties of this solution. These measurements, combined with secondary ion mass spectrometry, atomic force microscopy, and Auger electron spectroscop...

ANALYSIS OF SOME MAGNETIC PROPERTIES OF DILUTED MAGNETIC SEMICONDUCTORS

The susceptibility and specific heat experimental results of the diluted magnetic semiconductors (DMS) are incorporated in a model based on short-range as well as long-range interaction in a random may of magnetic ions. The so-called nearestneighbor pair approximation (NNPA) is applied. It appears that the calculated values of zero field specific heat and Curie-Weiss temperature based on th...

Magnetic Impurity States and Ferromagnetic Interaction in Diluted Magnetic Semiconductors

The electronic structure of diluted magnetic semiconductors is studied, especially focusing on the hole character. The Haldane-Anderson model is extend to a magnetic impurity, and is analyzed in the Hartree-Fock approximation. Due to the strong hybridization of an impurity d-states with host p-states, it is shown that holes are created in the valence band, at the same time the localized magneti...

Relaxation of magnetization in Cd1x Mn x Te diluted magnetic semiconductors under illumination

XAFS Studies of Diluted Magnetic Semiconductors Zn1-xMxS (M = Mn, Co)

X-ray absorption near edges structure -S) spectra of the Diluted Magnetic Semiconductors @MS) system Zn,&S (M=Mn, CO) have been measured at the M n and CO L,,>-edge using sample current mode. Analysis of the M L3,2-edge XANES spectra for Zn,.&S revealed the presence of a white line feature in each series, whose intensity increased linearly with concentration X. The white line feature is assigne...